A large-scale multi-projector display system offers high resolution, high brightness and immersive visualization for realistic experience to end users. It has been demonstrated to be effective tackling the conflict between the increasing demands of super-resolution display and the resolution limitation of a single display system. However, there is still no standardization method for curved surface projection screen. In this paper, we propose a novel approach for calibrating multiprojector display systems which have curved surfaces. Firstly, based on a detailed analysis on arbitrarily curved surfaces, we present a 3D reconstruction algorithm based on Bezier surface models. Then, for fully utilizing the projection area of each projector, we propose a novel curved-surface stitching algorithm to achieve geometry seamlessness of multi-projector display systems. Experimental results show that by constructing local Bessel models for the curved screen, the proposed method performs better than traditional approaches, i.e., the new method achieves geometric calibration with higher accuracy. The proposed method of modelling projection screen and the corresponding automatic geometric correction scheme effectively increase the utilization ratio of the original projection area of each projector and improve the calibration accuracy of multiprojector system with continuous curved surface.